wasi: flaky test on Windows

The following test fails sometimes on Windows:

```
--- FAIL: BenchmarkWasip1/Run/os.test
    require.go:331: expected no error, but was module closed with exit_code(1): stdout: 


        --- FAIL: TestOpenFileCreateExclDanglingSymlink (0.01s)
            --- FAIL: TestOpenFileCreateExclDanglingSymlink/NoRoot (0.00s)
            --- FAIL: TestOpenFileCreateExclDanglingSymlink/InRoot (0.00s)
```